Spool or cylinder for use in the wet handling of freshly-spun filaments



R. ETZKORN 1,867,309 SPOOL OR CYLINDER FOR USE IN THE WET HANDLING OF FRE'SHLY SPUN FILAMENTS July 12, 1932.

.Filed Nov, 19, 1930 Emma/tom lPupoLF Erzrromv Patented July 12, 1932 UNITED .STATES:

PATENT OFFICE BUDOLF ETZKO R-N, OF OBERBBUCH BEGIEBUNGSBEZBK AACHEN, GERMANY, AS- SIGNOB T0 AMERICAN GLANZSTOFF CORPORATION, OF NEW YORK, N. Y., A COB- I PORATION OF, DELAWARE SPOOL OR FOR USE IN THE WET HANDLING OF FRISHLY-SPUN FEAHENTS The wet handling of freshly spun artificial filaments may be accomplished inmany ways. Usually the filaments are wound upon spools or cylinders, and these spools or cylinders, as used in the art, may be solidsurfaced, perforated, or of porous material. Other spools and cylinders used in the art are provided with undulating projections on their surfaces, or with a porous textile coat- Figure 1 discloses a cross-section of a portion of a spool or cylinder surface;

F igure2 a plan view of the same; and

Figure 3 a general plan 'view of a cylinder or spool.

In Figure 1, depressions 1' on the surface 2'of a spool, are shown. Figure 2 shows the manner in which the grooves 1' may be arranged so that rhombic-shaped figures "3 are formed on the face of the spool. These rhombuses are enclosed or defined by the grooves 1. Certain of the grooves. here indicated as 1', are arranged in such a relationship with respect to the intersecting grooves 1, that the rhombic-shaped figures are in staggered relation one to the other.

The different planes of the rhombuses are thereby transposed so that no single peripheral groove is continuous. As the filaments are wound peripherally this arrangement prevents any of the filaments from lying entirely within one of the grooves 1. In Fig ure 3 I have shown the appearance of a porous cylinder provided with my newly-devised surface.

ample, be made Application filed November 19, 1930, Serial No. 496,715, and in Germany December 6, 1929.

It has been discovered that such an arrangement materially reduces the time required for the ordinary steps of wet-handling filaments. These steps are the washing, desulfurizing, bleaching, etc. By my new arrangement the surface of the spool or cylinder is divided into a number of small, level planes which do, not directly touch one another. It is better if the cross-sections of the grooves are so arranged that the filamentsor threads rest upon surfaces having only small interstices.

The shaping of the spool surface has no relationship whatever with, and is therefore independent of, the material of which the spools are constructed. They may, for exof metal, glass, earthenware, etc.

Compared with impermeable vspools with porous coatings, for instance, those possessing textile coverings, my new. spool has the advantageous distinction in that no obstructionof the grooves may occur. Textile coverings usually act as a filter and absorb small particles rinsed from the yarn by the liquids used in the wet-treatment process.

As there is no need to free a textile or porous coating from absorbed particles, etc., the period of treatment is further shortened.

As an example, it has been found that the time for washing freshly-spun viscose yarn may be reduced by from one-third to onehalf through the use of my spool. This entails a considerable saving of liquid and time, and further provides for a more careful treatment of the yarn.

Similar advantageous results may be obtained in the other wet-handling processes, such as desulfurizing, acidifying, bleaching, etc.

I do not wish to be limited to the grooves as shown and described, since the plane surfaces may for example have the shape of rhombuses, squares or oblongs. They might also be formed as circles, ellipses or dumbbells. llhe rhombuses, etc., may be so situated that the grooves 1 partly meet.

Having now described my invention, as

required by the patent statutes, what I claim 1. A spo1, the winding surface of which is provided with two series of grooves running in straight lines, the first series of grooves intersecting. the second, but the grooves of the second series being noncontinuous.

2. A spool having a winding surface adapted for use in the wet-handling of freshly-spun filaments, the solid surface of which comprises a series of like planes in stag ered relation one to the other, said planes eing defined by intersecting sets of grooves, one of said sets being noncontinuous.

3. In a device of the class described, a spool surface, grooves running longitudinally thereof, shorter grooves running from one of the first-mentioned grooves to another parallel therewith, said shorter grooves 'being noncontinuous, in their entirety, beyond the distance between said two adjacent longitudinal grooves.

In testimony whereof I aflix my signature.

4 RUDGLF ETZKORN. 

